Vise for use with machine tools



July 1 1924.

Filed April 20 1923 F. LEHMANN VISE FOR USE WITH MACHINE TOOLS 2 Sheets-Sheet l I Winn I I I LEHMANN VISE FOR USE WITH MACHINE TOOLS File April 20; 3.923

Patented duly l, llQZl.

UNHTED stares FRANZ I E MANN, 0F AL'ESTETTEN, SWITZERLAND.

VISE FQR USE WITH madman TOOLS.

Application filed April 20,

To all whom it may concem:

Be it known that I, FRANZ LEHMANN, a citizen of the Republic of Switzerland, and resident of Altstetten, in the Canton of Zurich, Switzerland, have invented certain new and useful Tm rovements in Vises for Use with Machine Tools, of which the following is a specification.

When employing the well known and ordinary chucks for lathes or clamping devices for planing or shaping-machines and other machine-tools, it is often dificult if not impossible to securel mount work-pieces of a delicate kind or o a certain construction, so that special tools have to be provided for each of the different kinds of articles to be till lathes, and

machined.

It is the object of my invention to overcome these drawbacks, the improved vise consisting of the combination with a baseplate adapted to be secured to the slidingcarriage of a planing-machine or to the faceplate of a lathe, of two housings mounted oppositely on the said base-plate, means to permit of a sliding movement of at least one of the housings relative to the other housing, and a seriesv of spring-controlled clamping jaws so arranged in each of the housings, that the projecting parts of a work-piece, for instance those of a portion of rail, when the latter is mounted between the jaws and when the slidable housing is moved towards the other, cause part of the jaws to be pressed back into the housings until all the springcontrolled jaws are in contact with and firmly grip the work-piece on all sides.

In order that the invention may be more clearly understood, ll refer to the accompanying drawings, wherein Fig. 1 shows a perspective view of the new vise adapted for use with a planingor shaping-machine, and illustrating how the work-piece, for instance part of a rail, is mounted;

Fig. 2 shows a plan view of this vise on a larger scale, certain parts, however, being omitted;

Fig. 3 represents a section through line 3- in Fig. 2;

ig. l isa perspective view of a modified construction of the vise adapted for use with Fig. 5 shows a plan view of Fig. 4 with certain parts omitted.

Similar parts are designated by like refer- 1923. Seriallilo. 633,504.

The housing 1 forms an integral part with the base-plate which, by the aid of slotted projections 49 and 4 fashioned at its sides and ends respectively, and bolts or screws, is adapted to be secured to the sliding carriage of the planing-machine. The two housings,

are fitted with detachable covers 1 and 2 respectively, and serve for the reception and as guides for a series of clamping jaws 7 of steel of which each is under the control of a pair of coil-springs 8. Each jaw is for this purpose provided with two bores to receive one end of the springs, the other end thereof resting against the inner wall of the housing. The springs have hereby the tendency to press the jaws forwardly through the inner and open portion of the housings, that is, towards the oppositely disposed set of jaws, a shoulder 9 formed at the underside of each of the jaws and a correspondin shoulder formed at the bottom of the housings limiting, however, the forward movement of the jaws 7. The said shoulders serve thus as stops for the clamping jaws when, upon a backward movement of the housing 2 by means of the spindle 5 and the handle 6 and the subsequent release of the work-piece A, these spring-controlled jaws are freed.

The several jaws of each set are separated from one another by guide plates 10 made of brass or other soft metal which rest on the base of the housings and abut against the covers thereof. The object of these plates is to assist in guiding and supporting the clamping jaws, while, 1n order to prevent accidental detachment of the work-piece once it has been secured in the position and manner illustrated in Fig. 1, set-screws 11 are provided at both sides of the housin s, these set-screws being tightened a ainst t e jaws.

And to permit of the mac ining of workpieces having parallel sides or faces and utilize, for uch purpose, the whole width of the housings, I provide the latter with recesses at their inner edges, into which re-. cesses additional clamping members are attached, as at 12, Figs. 1 and 2.

In practical use the vise described is securely mounted on the sliding carriage of the planing machine. The housing 2, by means of the handle 6 and spindle 5 is then caused to be moved in the direction of the opposite housing. Part of the spring-controlled clamping jaws" of each of the two sets are hereby brought in contact with the projecting portions of the work-piece, in the present case with the head and base of a rail iece, and thereby caused to be pressed back into their respective housings until all the jaws are made to abut against and, upon a further forward movement of the housing 2, securely grip the work-piece on all sides. The set-screws 11 are thereafter tightened against the jaws 7 and the grip on the worklece, if necessary, still further strengthened. lh hen machinin a series of like workpieces the so a justed clamping jaws remain in their position; when machining work-pieces having parallel sides, the springcontrolled jaws 7 are all caused to be pressed back into their housings until said jaws are in line with thestationary jaws 12. The set-screws 11 are then applied and the whole device used in the manner of an ordinary v1se. it

According to the modified construction, Figs. 4 and 5, adapted for use with lathes, the form and arrangement of the springcontrolled jaws 7 and the guide plates 10 are substantially the same as hereinbefore described. In this case, however, and to allow of exact centering of a work-piece which, for instance, is in the form of a handle A, both housings 13 and 14 for the clamping jaws are made slidable on the sliderest 15 of the base-plate 16, the latter being capable of attachment to the face-plate of the lathe in the known manner. The ad justment of the housings. is effected by means of screw-threaded spindles 17 extending through the correspondingly screwthreaded bottom portions of the said housings '(not shown), and the fixing of the jaws 7, subsequent to the mounting of the workpiece, is made possible by the aid of setscrews 11 in the way previously set forth, or

by any other suitable and known device.

What I claim as new and desire to secure by Letters Patent is 1. In the herein-described vise for use with machine-"tools, the combination, with a baseplate adapted to be secured to the carrier through the inner and open end thereof, and

means to fix the clamping aws in position.

2. In the herein-described vise for use with machine-tools, the combination, with a baseplate adapted to be secured to the carrier plate of the machine-tool and provided with a slide-rest, of two housings mounted opposite each other on the said slide-rest, a series of spring-controlled clamping jaws located in and guided by each of the two housings and projecting through the inner end thereof, means for allowing a sliding movement of at least one of the housings relative to the other, and means for securing the clamping jaws in position when, subsequent to the mounting of a work-piece between the two sets of jaws and the forward movement of the slidable housing, the whole of the springcontrolled jaws are brought in contact with and made to grip the work-piece on all sides. 3. In a vise for machine-tools of the type herein-described, the combination, with a base-plate adapted to be secured to the carrier plate of the machine-tool and having a slide;rest, of two housings mounted-opposite each other on the said slide-rest, a detachable cover for each of the housings, a series of spring-controlled clamping jaws located in the housin s and guided thereby and by the covers, a ditional clamping jaws mounted at each inner corner of the said housings, and means to-allow of the move ment' of at least one of the housings in relation to the other, all as and for the purpose set forth.

4. In a vise for machine-tools as hereindescribed, the combination, with abase-plate' least one of the housings relative the other, means to limit the movement of the jaws within the housings, and means to secure the said jaws in any of their adjusted positions.

' FRANZ LEHMANN. 

